Josh Radnor Ted Mosby Actor Jason Segel Marshall Erikson Actor Alyson Hannigan Lily Aldrin Actor Neil Patrick Harris Barney Stinson Actor Cobie Smulders Robin Sherbatsky Actor Bob Saget Narrator Lyndsy Fonseca Daughter Guest Star Alexis Denisof Sandy Rivers Guest Star David Henrie Son Guest Star Suzie Plakson Judy Eriksen Guest Star Virginia Williams Claudia Guest Star Ashley Williams Victoria Guest Star Marshall Manesh Ranjit Guest Star Joe Nieves Carl Guest Star Robert Michael Morris Vampire Lou Guest Star Matt Boren Stuart Guest Star Nick Jaine Sudeep Guest Star J.P. Manoux Not Moby Guest Star Charlene Amoia Wendy Guest Star David Burtka Scooter Guest Star Carter Bays Executive Producer, Writer Craig Thomas Executive Producer, Writer Pamela Fryman Director Chris Harris Writer Brenda Hsueh Writer Phil Lord Writer Kourtney Kang Writer Sam Johnson Writer Gloria Calderon Kellett Writer Ira Ungerleider Writer Maria Ferrari Writer Christopher Miller Writer Chris Marcil Writer